Let \(\delta >0\)  be the level of the noise in the data. Our goal now is to
estimate the accuracy of the minimizer \(V_{\min ,\lambda }^{h}\)  depending on
\(\delta .\)  Following the classical concept for ill-posed problems [1]},
we assume the existence of the exact solution
\(V^{h\ast }\in S^{h}\left( R,P^{h\ast }\right) \) 
